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Author:Aaltonen, Miamari
Title:Characterization of adherent anode slimes in copper electrorefining
Anodin pinnassa kiinni pysyvän anodiliejun karakterisointi kuparin raffinointielektrolyysissä
Publication type:Master's thesis
Publication year:2014
Pages:vi + 59      Language:   eng
Department/School:Materiaalitekniikan laitos
Main subject:Materiaalien prosessointi   (MT3002)
Supervisor:Forsén, Olof
Instructor:Aromaa, Jari
Electronic version URL: http://urn.fi/URN:NBN:fi:aalto-201412123224
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
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Location:P1 Ark Aalto  2573   | Archive
Keywords:copper electrorefining
adherent anode slimes
chemical analysis
nickel
particle size distribution
XRD
kuparin raffinointielektrolyysi
anodin pinnassa kiinni pysyvä anodilieju
nikkeli
laskeutus
partikkelikokojakauma
kemiallinen analyysi
optinen mikroskopia
Abstract (eng):The goals of the thesis were to produce information of the adherent anode slimes and to examine the effects that anode composition and process parameters have on them.
In the experimental section, 31 adherent anode slime samples were examined with the help of moisture content determination, settling tests, particle size distribution measurements, chemical analysis, x-ray diffraction and scanning electron microscopy.
Corresponding anode lug samples were examined with the help of chemical analysis and optical microscopy.

From the produced analysis data, correlations were difficult to establish.
A connection was found between the chemical and XRD analysis results of nickel, which is also in line with the information found in literature.
The process parameter data was not compared with the analysis results due to difficulties in connecting the sample with the corresponding data.

Based on the analysis results, adherent anode slime sampling and some of the experimental methods need to be developed further.
Also, information can still be extracted from the data produced with the help of more advanced data analysis.
Abstract (fin):Työn tavoitteina on tuottaa tietoa anodin pinnassa kiinni pysyvän anodiliejun ominaisuuksista sekä tutkia, miten anodin koostumus sekä prosessiparametrit niihin vaikuttavat.
Anodin pinnassa kiinni pysyvän anodiliejun ominaisuuksiin liittyvää tietoa tuotettiin 31 liejunäytteen kosteusprosenttimäärityksen, laskeutuskokeiden, partikkelikokojakauma-analyysien, kemiallisten analyysien, XRD-analyysien sekä SEM-kuvien avulla.
Liejunäytteitä vastaavat anodinäytteet tutkittiin kemiallisen analyysin ja optisen mikroskopian avulla.

Eri analyysitulosten välisiä korrelaatioita oli vaikea löytää.
Ainoa merkittävä yhteys ilmeni nikkelin kemiallisten ja XRD-analyysien välillä.
Löytynyt yhteys mainitaan myös kirjallisuuslähteissä.
Prosessiparametrien vaikutusta liejun analyysituloksiin ei lopulta tutkittu johtuen hankaluuksista prosessiparametridatan yhdistämisessä tiettyyn näytteeseen.

Analyysitulosten perusteella anodin pinnassa kiinni pysyvän anodiliejun näytteenottoa sekä joitakin kokeellisia menetelmiä tulee vielä kehittää.
Analyysituloksista lienee myös mahdollista löytää lisää korrelaatioita kehittyneempien data-analyysien avulla.
ED:2014-12-21
INSSI record number: 50232
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